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| 型号： | TS87C52X2-VICR |
| 厂商： | ATMEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 40 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | PLASTIC, QFP-44 |
| 文件页数： | 54/56页 |
| 文件大小： | 790K |
| 代理商： | TS87C52X2-VICR |
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Rev.D - 16 November, 2000
7
TS80C32X2
TS87C52X2
TS80C52X2
6. TS80C52X2 Enhanced Features
In comparison to the original 80C52, the TS80C52X2 implements some new features, which are:
The X2 option.
The Dual Data Pointer.
The 4 level interrupt priority system.
The power-off flag.
The ONCE mode.
The ALE disabling.
Some enhanced features are also located in the UART and the timer 2.
6.1 X2 Feature
The TS80C52X2 core needs only 6 clock periods per machine cycle. This feature called ”X2” provides the following
advantages:
q
Divide frequency crystals by 2 (cheaper crystals) while keeping same CPU power.
q
Save power consumption while keeping same CPU power (oscillator power saving).
q
Save power consumption by dividing dynamically operating frequency by 2 in operating and idle modes.
q
Increase CPU power by 2 while keeping same crystal frequency.
In order to keep the original C51 compatibility, a divider by 2 is inserted between the XTAL1 signal and the main
clock input of the core (phase generator). This divider may be disabled by software.
6.1.1 Description
The clock for the whole circuit and peripheral is first divided by two before being used by the CPU core and
peripherals. This allows any cyclic ratio to be accepted on XTAL1 input. In X2 mode, as this divider is bypassed,
the signals on XTAL1 must have a cyclic ratio between 40 to 60%. Figure 1. shows the clock generation block
diagram. X2 bit is validated on XTAL1
÷2 rising edge to avoid glitches when switching from X2 to STD mode.
Figure 2. shows the mode switching waveforms.
Figure 1. Clock Generation Diagram
XTAL1
2
CKCON reg
X2
state machine: 6 clock cycles.
CPU control
FOSC
FXTAL
0
1
XTAL1:2
相关PDF资料 |
PDF描述 |
|---|---|
| TS80C32X2-LCBR | 8-BIT, 30 MHz, MICROCONTROLLER, PQCC44 |
| TS80C32X2-VIA | 8-BIT, 60 MHz, MICROCONTROLLER, PDIP40 |
| TS80C32X2-LIA | 8-BIT, 30 MHz, MICROCONTROLLER, PDIP40 |
| TS87C51RB2-EBR | 8-BIT, OTPROM, MICROCONTROLLER, PQCC44 |
| TS80C51RD2-MCBB | 8-BIT, 40 MHz, MICROCONTROLLER, PQCC44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS87C52X2-VIE | 功能描述:IC MCU 8BIT 8K OTP 40MHZ 44-VQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:87C 标准包装:1,500 系列:AVR® ATtiny 核心处理器:AVR 芯体尺寸:8-位 速度:16MHz 连通性:I²C，LIN，SPI，UART/USART，USI 外围设备:欠压检测/复位，POR，PWM，温度传感器，WDT 输入/输出数:16 程序存储器容量:8KB（4K x 16） 程序存储器类型:闪存 EEPROM 大小:512 x 8 RAM 容量:512 x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 11x10b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:20-SOIC（0.295"，7.50mm 宽） 包装:带卷 (TR) |
| TS87C52X2-VIEB | 制造商:TEMIC 制造商全称:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz |
| TS87C52X2-VIED | 制造商:TEMIC 制造商全称:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz |
| TS87C52X2-VIER | 制造商:TEMIC 制造商全称:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz |
| TS87C52X2-VIJB | 制造商:TEMIC 制造商全称:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz |
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